Process for the preparation of a distortion resistant polyester

Details Process for the preparation of a distortion resistant polyester Process for the preparation of a distortion resistant polyester

1986-11-07

1987-10-13

Brammer, Jack P.

Radiation imagery chemistry: process, composition, or product th

Imaging affecting physical property of radiation sensitive...

Radiation sensitive composition or product or process of making

427402, 430534, 430535, G03C 176

Patent

active

046998691

ABSTRACT:
Photosensitive element comprisng a polyester, e.g., polyethylene terephthalate, at least 0.008 inch (0.20 mm) thick bearing on both sides a polymeric water-vapor barrier layer at least 0.00001 inch (0.00025 mm) thick of a copolymer of vinylidene chloride containing at least 80% by weight of vinylidene chloride and minor amounts of alkyl acrylate, and itaconic acid, and on at least one side of said barrier layer, a layer of a photosenstive material, e.g., silver halide emulsion, diazo or photopolymer. The element in the form of a phototool limits dimensional change within 6 hours after exposure to a 5% Relative Humidity change to no more than 0.001 inch (0.025 mm) per 24 inches (60.96 cm).

REFERENCES:
patent: 3271178 (1966-09-01), Nadeau et al.
patent: 3434840 (1969-03-01), DeKeyser et al.
patent: 4002802 (1977-01-01), Bayless et al.
patent: 4196001 (1980-04-01), Joseph et al.
patent: 4254210 (1981-03-01), Van Stappen
patent: 4287298 (1981-09-01), Dodwell
patent: 4407938 (1983-10-01), Mizukura et al.
A Coordinatograph-Glass Grid Method For Measuring Dimensional Changes in Films, Kenneth M. Smith, Journal of Applied Photographic Engineering, vol. 1, Fall 1975, pp. 12 to 17.
The Dimensional Stability of Polyester Photographic Films, Kenneth M. Smith, copyright 1979 by E. I. du Pont de Nemours and Company.

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